His name is Harry Wayne Casey, and even though he has sold over 75 million albums, he is still only recognized by KC. In the middle of a year long tour, KC of KC and the Sunshine Band found the time to talk and discuss everything from his drug addiction to his upcoming album, from his movie appearances to the resurgence of ’70s music in the ’90s.KC will bring the Sunshine Band, with original members Beverly Foster on background vocals and Fermin Goytisolo on percussion, to the Polaris Amphitheater on July 25. Accompanying KC will be 15 dancers and what he promises to be “a fun time in a city he likes to play in.”After his first single, “Blow Your Whistle,” went to No. 15 on the R&B charts in 1973, KC followed up with two triple-platinum albums. The first, KC & The Sunshine Band, included the hits “Get Down Tonight” and “That’s the Way I Like It,” and Part 3, which had the chart toppers “I’m Your Boogie Man” and “Shake Your Booty” started the disco trend and made a rare crossover between the R&B and pop charts.Later, as the disco era faded away, KC called it quits from the music industry and an addiction took hold that wouldn’t let go. He battled drug and alcohol addictions, but came out on top, he says.”I’m a strong son of a bitch,” KC said. “You really have to be. I feel so bad for musicians today. It is a lot tougher road than I had to take, and it can grab ahold of you.”After an eight-year hiatus, the struggle with addiction and a near-fatal car accident, KC went back to his first love: music.In 1993, KC released “Oh Yeah,” an album for XYZ Records. Critically, it bombed.”Critics say what they want. If they like a style of music, they like the record. Critics were after me when disco was popular in the ’70s, so they were ready for me to fail in the ’90s,” KC said. “They like rock ‘n’ roll, and they will praise some bands that I say to myself, ‘You’ve got to be kidding me.'”There hasn’t been in my opinion, any rock ‘n’ roll that compares to Cream, Zeppelin and Hendrix. It’s ultimately the public that decide if my music is good, and I will still try to please them.”But the resurgence of disco in the ’90s has given KC a new lease on life. A career that was dragging before now found itself as the topic of a VH-1 documentary. KC embarked on a tour playing crowds of 20,000 screaming fans.”The early ’90s music was very dark. People were ready to go back to the ’70s and enjoy themselves again. In the ’60s people were talking about peace and love. But in the ’70s, we were actually living it,” KC said. “I remember looking into my audiences seeing half white, half minority, half male, half female. People want to get back to that time and I think my music helps take them there. You can see it as bands cover not only my songs, but all types of ’70s songs.”When asked which was his favorite remake of his song, KC replied, “Believe it or not White Zombie did a remake of ‘I’m Your Boogie Man,’ that I thought was unbelievable. Most bands just bastardize and copy what we did, but Rob Zombie went a step further. It was great.”So what’s next? KC is following up his “Oh Yeah” release with a 25-year anniversary double CD on July 20 and a release of new material, tentatively entitled “Yummy.” He is also playing a part in the upcoming movie “Pilot,” with Kenny Rogers and Lance from “N’Sync.” KC has also appeared in films such as “Private Parts,” “Boogie Nights,” and “The Devil’s Advocate.””I’m just having fun doing it all. I was out of show business for eight to nine years and I want to do everything,” KC said.